/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.uzmap.pkg.uzmodules.uzFNScanner.Zxing.camera;

import java.io.IOException;

import org.simple.eventbus.EventBus;
import org.simple.eventbus.Subscriber;

import com.uzmap.pkg.a.a.f;
import com.uzmap.pkg.uzmodules.uzFNScanner.UzFNScanner;
import com.uzmap.pkg.uzmodules.uzFNScanner.Zxing.CaptureActivity;

import android.content.Context;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.graphics.Rect;
import android.hardware.Camera;
import android.hardware.Camera.OnZoomChangeListener;
import android.hardware.Camera.Parameters;
import android.os.Build;
import android.os.Handler;
import android.util.Log;
import android.view.SurfaceHolder;

/**
 * This object wraps the Camera service object and expects to be the only one
 * talking to it. The implementation encapsulates the steps needed to take
 * preview-sized images, which are used for both preview and decoding.
 * 
 * @author dswitkin@google.com (Daniel Switkin)
 */
@SuppressWarnings("deprecation")
public final class CameraManager {

	private static final String TAG = CameraManager.class.getSimpleName();
	private static CameraManager cameraManager;
	private static final int MIN_FRAME_WIDTH = 240;
	private static final int MIN_FRAME_HEIGHT = 240;
	private static final int MAX_FRAME_WIDTH = 480;
	private static final int MAX_FRAME_HEIGHT = 360;

	static final int SDK_INT; // Later we can use Build.VERSION.SDK_INT
	static {
		int sdkInt;
		try {
			sdkInt = Integer.parseInt(Build.VERSION.SDK);
		} catch (NumberFormatException nfe) {
			// Just to be safe
			sdkInt = 10000;
		}
		SDK_INT = sdkInt;
	}

	private final CameraConfigurationManager configManager;
	private Camera camera;
	private Rect framingRect;
	private Rect framingLandRect;
	private Rect framingRectInPreview;
	private boolean initialized;
	private boolean previewing;
	private final boolean useOneShotPreviewCallback;
	/**
	 * Preview frames are delivered here, which we pass on to the registered
	 * handler. Make sure to clear the handler so it will only receive one message.
	 */
	private final PreviewCallback previewCallback;
	/**
	 * Autofocus callbacks arrive here, and are dispatched to the Handler which
	 * requested them.
	 */
	private final AutoFocusCallback autoFocusCallback;

	private Parameters parameter;

	/**
	 * Initializes this static object with the Context of the calling Activity.
	 * 
	 * @param context
	 *            The Activity which wants to use the camera.
	 */
	public static void init(Context context) {
		// if (cameraManager == null) {
		// cameraManager = new CameraManager(context);
		// }
		cameraManager = new CameraManager(context);
	}

	/**
	 * Gets the CameraManager singleton instance.
	 * 
	 * @return A reference to the CameraManager singleton.
	 */
	public static CameraManager get() {
		return cameraManager;
	}

	private Context mContext;

	private CameraManager(Context context) {
		this.configManager = new CameraConfigurationManager(context);
		this.mContext = context;
		// Camera.setOneShotPreviewCallback() has a race condition in Cupcake,
		// so we use the older
		// Camera.setPreviewCallback() on 1.5 and earlier. For Donut and later,
		// we need to use
		// the more efficient one shot callback, as the older one can swamp the
		// system and cause it
		// to run out of memory. We can't use SDK_INT because it was introduced
		// in the Donut SDK.
		// useOneShotPreviewCallback = Integer.parseInt(Build.VERSION.SDK) >
		// Build.VERSION_CODES.CUPCAKE;
		useOneShotPreviewCallback = Integer.parseInt(Build.VERSION.SDK) > 3; // 3
																				// =
																				// Cupcake

		previewCallback = new PreviewCallback(configManager, useOneShotPreviewCallback);
		autoFocusCallback = new AutoFocusCallback();

		EventBus.getDefault().register(this);
	}

	private boolean mPortraitFlag = true;

	@Subscriber(tag = "reset_orientation")
	private void updateFlag(boolean flag) {
		mPortraitFlag = flag;
	}

	/**
	 * Opens the camera driver and initializes the hardware parameters.
	 * 
	 * @param holder
	 *            The surface object which the camera will draw preview frames into.
	 * @throws IOException
	 *             Indicates the camera driver failed to open.
	 */
	public void openDriver(SurfaceHolder holder, int w, int h, boolean isWindow) throws IOException {
		if (camera == null) {
			camera = Camera.open();
			if (camera == null) {
				throw new IOException();
			}
			camera.setPreviewDisplay(holder);

			if (!initialized) {
				initialized = true;
				configManager.initFromCameraParameters(camera, w, h, isWindow);
			}
			configManager.setDesiredCameraParameters(camera);

			// SharedPreferences prefs =
			// PreferenceManager.getDefaultSharedPreferences(context);
			// �Ƿ�ʹ��ǰ��
			// if (prefs.getBoolean(PreferencesActivity.KEY_FRONT_LIGHT, false))
			// {
			// FlashlightManager.enableFlashlight();
			// }
			FlashlightManager.enableFlashlight();
		}
	}

	public void setScreemOrientation(int angle) {
		if (camera != null)
			camera.setDisplayOrientation(angle);
	}

	/**
	 * Closes the camera driver if still in use.
	 */
	public void closeDriver() {
		if (camera != null) {
			FlashlightManager.disableFlashlight();
			camera.release();
			camera = null;
		}
	}

	/**
	 * Asks the camera hardware to begin drawing preview frames to the screen.
	 */
	public void startPreview() {
		if (camera != null && !previewing) {
			camera.startPreview();
			previewing = true;
		}
	}

	/**
	 * Tells the camera to stop drawing preview frames.
	 */
	public void stopPreview() {
		if (camera != null && previewing) {
			Log.i("stopcall", "stop call back !!!");
			if (!useOneShotPreviewCallback) {
				camera.setPreviewCallback(null);
			}
			camera.stopPreview();
			previewCallback.setHandler(null, 0);
			autoFocusCallback.setHandler(null, 0);
			previewing = false;
		}
	}

	/**
	 * A single preview frame will be returned to the handler supplied. The data
	 * will arrive as byte[] in the message.obj field, with width and height encoded
	 * as message.arg1 and message.arg2, respectively.
	 * 
	 * @param handler
	 *            The handler to send the message to.
	 * @param message
	 *            The what field of the message to be sent.
	 */
	public void requestPreviewFrame(Handler handler, int message) {
		if (camera != null && previewing) {
			previewCallback.setHandler(handler, message);
			if (useOneShotPreviewCallback) {
				camera.setOneShotPreviewCallback(previewCallback);
			} else {
				camera.setPreviewCallback(previewCallback);
			}
		}
	}

	/**
	 * Asks the camera hardware to perform an autofocus.
	 * 
	 * @param handler
	 *            The Handler to notify when the autofocus completes.
	 * @param message
	 *            The message to deliver.
	 */
	public void requestAutoFocus(Handler handler, int message) {
		if (camera != null && previewing) {
			autoFocusCallback.setHandler(handler, message);
			// Log.d(TAG, "Requesting auto-focus callback");
			camera.autoFocus(autoFocusCallback);
		}
	}

	/**
	 * Calculates the framing rect which the UI should draw to show the user where
	 * to place the barcode. This target helps with alignment as well as forces the
	 * user to hold the device far enough away to ensure the image will be in focus.
	 * 
	 * @return The rectangle to draw on screen in window coordinates.
	 */
	public Rect getFramingRect() {
		Point screenResolution = configManager.getScreenResolution();
		if (screenResolution != null) {
			if (framingRect == null) {
				if (camera == null) {
					return null;
				}

				int width = screenResolution.x * 7 / 10;
				int height = screenResolution.y * 7 / 10;

				if (height >= width) { // 竖屏
					height = width;
				} else { // 横屏
					width = height;
				}

				int leftOffset = (screenResolution.x - width) / 2;
				int topOffset = (screenResolution.y - height) / 3;
				// framingRect = new Rect(leftOffset, topOffset + 250, leftOffset + width,
				// topOffset + height - 400);
				framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + height);
				// framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset +
				// height);

				// 原生
				// int width = screenResolution.x * 3 / 4;
				// if (width < MIN_FRAME_WIDTH) {
				// width = MIN_FRAME_WIDTH;
				// } else if (width > MAX_FRAME_WIDTH) {
				// width = MAX_FRAME_WIDTH;
				// }
				// int height = screenResolution.y * 3 / 4;
				// if (height < MIN_FRAME_HEIGHT) {
				// height = MIN_FRAME_HEIGHT;
				// } else if (height > MAX_FRAME_HEIGHT) {
				// height = MAX_FRAME_HEIGHT;
				// }
				// int leftOffset = (screenResolution.x - width) / 2;
				// int topOffset = (screenResolution.y - height) / 2;
				// framingRect = new Rect(leftOffset, topOffset, leftOffset
				// + width, topOffset + height);
				Log.e(TAG, "Calculated framing rect: " + framingRect);
			}

		}
		return framingRect;
	}

	public Rect getLandFramingRect() {
		Point screenResolution = configManager.getScreenResolution();
		if (screenResolution != null) {
			if (framingLandRect == null) {
				if (camera == null) {
					return null;
				}

				// int width = screenResolution.x * 7;
				// int height = screenResolution.y * 7 / 10;

				// if(height >= width) { //竖屏
				// height = width;
				// } else { //横屏
				// width = height;
				// }

				// int leftOffset = (screenResolution.x - width) / 2;
				// int topOffset = (screenResolution.y - height) / 3;
				// framingLandRect = new Rect(leftOffset, topOffset, leftOffset + width,
				// topOffset + height);

				// 原生
				int width = screenResolution.x * 3 / 4;
				// if (width < MIN_FRAME_WIDTH) {
				// width = MIN_FRAME_WIDTH;
				// } else if (width > MAX_FRAME_WIDTH) {
				// width = MAX_FRAME_WIDTH;
				// }
				int height = screenResolution.y * 3 / 4;
				// if (height < MIN_FRAME_HEIGHT) {
				// height = MIN_FRAME_HEIGHT;
				// } else if (height > MAX_FRAME_HEIGHT) {
				// height = MAX_FRAME_HEIGHT;
				// }
				int leftOffset = (screenResolution.x - width) / 2;
				int topOffset = (screenResolution.y - height) / 2;
				framingLandRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + height);
				Log.e(TAG, "Calculated framing rect: " + framingLandRect);
			}

		}
		return framingLandRect;
	}

	// public Rect getFramingRect() {
	// Point screenResolution = configManager.getScreenResolution();
	// if (framingRect == null) {
	// if (camera == null) {
	// return null;
	// }
	// int width = screenResolution.x * 3 / 4;
	// if (width < MIN_FRAME_WIDTH) {
	// width = MIN_FRAME_WIDTH;
	// } else if (width > MAX_FRAME_WIDTH) {
	// width = MAX_FRAME_WIDTH;
	// }
	// int height = screenResolution.y * 3 / 4;
	// if (height < MIN_FRAME_HEIGHT) {
	// height = MIN_FRAME_HEIGHT;
	// } else if (height > MAX_FRAME_HEIGHT) {
	// height = MAX_FRAME_HEIGHT;
	// }
	// int leftOffset = (screenResolution.x - width) / 2;
	// int topOffset = (screenResolution.y - height) / 2;
	// framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset +
	// height);
	// Log.d(TAG, "Calculated framing rect: " + framingRect);
	// }
	// return framingRect;
	// }

	/**
	 * Like {@link #getFramingRect} but coordinates are in terms of the preview
	 * frame, not UI / screen.
	 */
	public Rect getFramingRectInPreview() {
		if (framingRectInPreview == null) {
			Rect rect = new Rect(getFramingRect());
			Point cameraResolution = configManager.getCameraResolution();
			Point screenResolution = configManager.getScreenResolution();
			// rect.left = rect.left * cameraResolution.x / screenResolution.x;
			// rect.right = rect.right * cameraResolution.x / screenResolution.x;
			// rect.top = rect.top * cameraResolution.y / screenResolution.y;
			// rect.bottom = rect.bottom * cameraResolution.y / screenResolution.y;

			if (UzFNScanner.isWindow) {
				rect.left = rect.left * cameraResolution.y / screenResolution.x;
				rect.right = rect.right * cameraResolution.y / screenResolution.x;
				rect.top = rect.top * cameraResolution.x / screenResolution.y;
				rect.bottom = rect.bottom * cameraResolution.x / screenResolution.y;
			} else {
				if (mPortraitFlag) {
					rect.left = rect.left * cameraResolution.y / screenResolution.x;
					rect.right = rect.right * cameraResolution.y / screenResolution.x;
					rect.top = rect.top * cameraResolution.x / screenResolution.y;
					rect.bottom = rect.bottom * cameraResolution.x / screenResolution.y;
				} else {
					rect.left = rect.left * cameraResolution.x / screenResolution.x;
					rect.right = rect.right * cameraResolution.x / screenResolution.x;
					rect.top = rect.top * cameraResolution.y / screenResolution.y;
					rect.bottom = rect.bottom * cameraResolution.y / screenResolution.y;
				}
			}

			framingRectInPreview = rect;
		}
		return framingRectInPreview;
	}

	/**
	 * Converts the result points from still resolution coordinates to screen
	 * coordinates.
	 * 
	 * @param points
	 *            The points returned by the Reader subclass through
	 *            Result.getResultPoints().
	 * @return An array of Points scaled to the size of the framing rect and offset
	 *         appropriately so they can be drawn in screen coordinates.
	 */
	/*
	 * public Point[] convertResultPoints(ResultPoint[] points) { Rect frame =
	 * getFramingRectInPreview(); int count = points.length; Point[] output = new
	 * Point[count]; for (int x = 0; x < count; x++) { output[x] = new Point();
	 * output[x].x = frame.left + (int) (points[x].getX() + 0.5f); output[x].y =
	 * frame.top + (int) (points[x].getY() + 0.5f); } return output; }
	 */

	/**
	 * A factory method to build the appropriate LuminanceSource object based on the
	 * format of the preview buffers, as described by Camera.Parameters.
	 * 
	 * @param data
	 *            A preview frame.
	 * @param width
	 *            The width of the image.
	 * @param height
	 *            The height of the image.
	 * @return A PlanarYUVLuminanceSource instance.
	 */
	public PlanarYUVLuminanceSource buildLuminanceSource(byte[] data, int width, int height) {
		Rect rect = getFramingRectInPreview();
		int previewFormat = configManager.getPreviewFormat();
		String previewFormatString = configManager.getPreviewFormatString();
		switch (previewFormat) {
		// This is the standard Android format which all devices are REQUIRED to
		// support.
		// In theory, it's the only one we should ever care about.
		case PixelFormat.YCbCr_420_SP:
			// This format has never been seen in the wild, but is compatible as
			// we only care
			// about the Y channel, so allow it.
		case PixelFormat.YCbCr_422_SP:
			return new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top, rect.width(), rect.height());
		default:
			// The Samsung Moment incorrectly uses this variant instead of the
			// 'sp' version.
			// Fortunately, it too has all the Y data up front, so we can read
			// it.
			if ("yuv420p".equals(previewFormatString)) {
				return new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top, rect.width(),
						rect.height());
			}
		}
		throw new IllegalArgumentException("Unsupported picture format: " + previewFormat + '/' + previewFormatString);
	}

	public void openLight() {
		if (camera != null) {
			parameter = camera.getParameters();
			parameter.setFlashMode(Parameters.FLASH_MODE_TORCH);
			camera.setParameters(parameter);
		}
	}

	public void offLight() {
		if (camera != null) {
			parameter = camera.getParameters();
			parameter.setFlashMode(Parameters.FLASH_MODE_OFF);
			camera.setParameters(parameter);
		}
	}
}
